* 6.0L Vortec V8: This was the standard engine, producing 320 horsepower and 380 lb-ft of torque.
* 6.6L Duramax V8 Turbo Diesel: This was an optional engine, producing 397 horsepower and 765 lb-ft of torque.
It's important to note that these are the standard horsepower and torque figures. Specific figures may vary depending on trim level and transmission.
